Zipper structure for suitcases, and trolley bag

ABSTRACT

Provided is a zipper structure for suitcases, including a zipper strip. The zipper strip includes a front chain belt and a rear chain belt, and also includes a front frame strip and a rear frame strip. The front frame strip is bonded on the front case of the suitcase by thermal pressing. The rear frame strip is bonded on the rear case of the suitcase by thermal pressing. The front chain belt is connected to the front frame strip through the front zipper fixing coil. The rear chain belt is connected to the rear frame strip through the rear zipper fixing coil. Also disclosed is a trolley bag utilizing the zipper structure for suitcases as described. The zipper structure and trolley bag as provided cancels the traditional manual sew process and realize the automatic production for zipper suitcases.

CROSS REFERENCE OF RELATED APPLICATIONS

This application is a continuation in part of U.S. patent application Ser. No. 17/659,481, filed Apr. 15, 2022, which is a continuation application of PCT patent Application No. PCT/CN2020/132562, filed on Nov. 30, 2020, entitled “ZIPPER STRUCTURE FOR SUITCASES, AND TROLLEY BAG,” which claims foreign priority of Chinese Patent Application No. 201922246100.3, filed Dec. 16, 2019 in the China National Intellectual Property Administration (CNIPA), the entire contents of which are hereby incorporated by reference in their entireties.

FIELD OF THE DISCLOSURE

The present invention relates to the technical field of suitcase, especially to a zipper structure for suitcases, and a trolley bag.

BACKGROUND OF THE DISCLOSURE

A trolley bag refers to a suitcase with a trolley handle and rollers. Because of the rollers at the bottom, the user can drag it directly, which is very convenient and labor-saving to use. At present, the trolley bags on the market can be roughly divided into two types: zipper trolley bags (referred to as zipper suitcases) and frame trolley bags (referred to as frame suitcases). The zipper suitcase is lighter in weight and is deeply loved by people. However, the zipper needs to be manually sewn during the current manufacturing, which requires more manpower and cannot realize automatic production.

SUMMARY OF THE DISCLOSURE

In view of this, the present invention provides a zipper structure for suitcases, and a trolley bag which can be automatically produced.

In order to achieve the aforementioned object, the present invention provides the following technical solutions: a zipper structure for suitcases, including a zipper strip. The zipper strip includes a front chain belt and a rear chain belt, and also includes a front frame strip and a rear frame strip. The front frame strip is bonded on the front case of the suitcase by thermal pressing. The rear frame strip is bonded on the rear case of the suitcase by thermal pressing. The front chain belt is connected to the front frame strip through the front zipper fixing coil. The rear chain belt is connected to the rear frame strip through the rear zipper fixing coil.

Furthermore, a first extension portion and a second extension portion are arranged at intervals on the front frame strip. A first clamping slot capable of receiving the insertion of the front case is formed between the first extension portion and the second extension portion.

Furthermore, a third extension portion and a fourth extension portion are arranged on the rear frame strip at intervals. A second clamping slot is formed between the third extension portion and the fourth extension portion, into which the rear case can be fitted and inserted.

Furthermore, a first locking strip portion of the front zipper fixing coil is inserted into a first locking groove of the front frame strip. The second locking strip portion of the rear zipper fixing coil is inserted into a second locking groove of the rear frame strip.

Furthermore, the zipper structure also includes a front lining fixing coil and a rear lining fixing coil. The front lining fixing coil is connected to a front lining of the suitcase. The rear lining fixing coil is connected to a rear lining of the suitcase. The front frame strip is provided with a third clamping groove into which a third clamping strip portion of the front lining fixing coil is inserted. The rear frame strip is provided with a fourth clamping groove into which a fourth clamping strip portion of the rear lining fixing coil is inserted.

Furthermore, the front frame strip is provided with a recessed portion. The rear frame strip is provided with a protrusion portion. When the zipper strip is closed, the recessed portion and the protrusion portion are engaged together.

Furthermore, the front lining fixing coil is sewn on the front lining. The rear lining fixing coil is sewn on the rear lining.

The invention also provides a trolley bag, which utilizes any of the aforementioned zipper structures for suitcases.

Furthermore, the trolley bag further includes a rear cover. The rear cover is arranged on the trolley bag. The rear cover is configured to cover a joint seam of the front frame strip and the rear frame strip. Two ends of the rear cover are foot nails that play a supporting role. A middle part of the rear cover is a soft rubber portion.

Furthermore, a plurality of decorative strips arranged vertically are provided on an outer surface of the trolley bag. The decorative strip is blade-shaped.

As can be seen from the above-mentioned technical solutions, the advantages of the present invention are as follows:

Compared with the prior art, the invention cancels the traditional manual sewing by improving the product structure, so that the zipper suitcase can be automatically produced. Conventional soft strips are replaced by hard front and rear strips. Additionally, a protrusion portion is disposed on the front frame strip, and a recessed portion is disposed on the rear frame strip, so that the zipper suitcase is as strong as the frame suitcase. This makes the zipper suitcase as provided in the present invention more secure when loaded with luggage, free of the unstable state in conventional zipper suitcase. Moreover, the thickness and cross-sectional shape of the front frame strip and the rear frame strip can be adjusted according to sizes of the case of the suitcases.

In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail below with reference to the drawings.

BRIEF DESCRIPTION OF DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts. In the drawings:

FIG. 1 is a three-dimensional schematic diagram of the trolley bag of the present invention.

FIG. 2 is an exploded view of the trolley bag of the present invention.

FIG. 3 is a cross-sectional schematic diagram of the trolley bag of the present invention.

FIG. 4 is an enlarged schematic view of the structure at X in FIG. 3 .

FIG. 5 is a schematic diagram of the front frame strip and the rear frame strip in embodiment one of the present invention.

FIG. 6 is a schematic diagram of the second front frame strip and the second rear frame strip in the embodiment two of the present invention.

FIG. 7 is another three-dimensional schematic diagram of the trolley bag of the present invention.

Character references: 10—front case; 101—first insertion portion; 20—rear case; 201—second insertion portion; 30—wheel set; 40—first handle; 50—customs lock; 60—slider pull tab; 70—second handle; 80—decorative strip; 1—front frame strip; 1A—second front frame strip; 11—first locking groove; 12—third locking groove; 13—recessed portion; 14—first extension portion; 15—second extension portion; 16—clamping slot; 2—rear frame strip; 2A—second rear frame strip; 21—second locking groove; 22—fourth locking groove; 23—protrusion portion; 24—third extension portion; 25—fourth extension portion; 26—second clamping slot; 3—zipper strip; 31—front chain belt; 32—rear chain belt 32; 33—slider; 4—front zipper fixing coil; 41—first locking strip portion; 42—first connecting strip portion; 5—rear zipper fixing coil; 51—second locking strip portion; 52—second connecting strip portion; 6—front lining fixing coil; 61—third locking strip portion; 62—third connecting strip portion; 7—rear lining fixing coil; 71—fourth locking strip portion; 72—fourth connecting strip portion; 8—rear cover; 81—foot nail; 82—soft rubber portion; 91—front lining; 92—rear lining.

DETAILED DESCRIPTION OF THE DISCLOSURE

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Embodiment One

As shown in FIG. 1 and FIG. 2 , a trolley bag includes a case, a wheel set 30, a first handle 40, a customs lock 50, a slider pull tab 60, a second handle 70 and a pair of rear covers 8. The case includes a front case 10 and a rear case 20. A front lining 91 is provided inside the front case 10. A rear lining 92 is provided inside the rear case 20. A trolley handle is provided on the rear case 20. The wheel set 30 is provided at the bottom of the front case 10 and the rear case 20. A first handle 40 is provided on the top of the front case 10. The customs lock 50 is provided on one side of the front case 10. The slider pull tab 60 is used in conjunction with the customs lock 50. The second handle 70 is disposed on the side of the rear case 20 on the same side as the side where the customs lock 50 is located. A pair of rear covers 8 are spaced apart on the side of the trolley bag opposite the side where the customs lock 50 is located. One end of the rear cover 8 is connected to the front case 10. The other end of the rear cover 8 is connected to the rear case 20. The two ends of the rear cover 8 are foot nails 81 playing a role of support. The middle part of the rear cover 8 is the soft rubber portion 82. The trolley bag can be opened at any angle without broken because of the enhanced deformation of the soft rubber portion 82. In addition, the trolley bag also includes a zipper structure for suitcases.

As shown in FIG. 2 , FIG. 3 , and FIG. 4 , the zipper structure for suitcases includes a front frame strip 1, a rear frame strip 2, a zipper strip 3, a front zipper fixing coil 4, a rear zipper fixing coil 5, and a front lining fixing coil 6 and a rear lining fixing coil 7. The zipper strip 3 includes a front chain belt 31, a rear chain belt 32 engaging the front chain belt 31, and a slider 33 slidably connected between the front chain belt 31 and the rear chain belt 32. The front frame strip 1 is provided with a first extension portion 14 and a second extension portion 15 at intervals. Between the first extension portion 14 and the second extension portion 15, a first clamping slot 16 is formed into which a first insertion portion 101 of the front case 10 can be fitted and inserted. The rear frame strip 2 is provided with a third extension portion 24 and a fourth extension portion 25 at intervals. A second clamping slot 26 is formed between the third extension portion 24 and the fourth extension portion 25, into which a second insertion portion 201 of the rear case 20 can be fitted and inserted. The front zipper fixing coil 4 has a first locking portion 41 and a first connecting strip portion 42 which are connected to each other. The front frame strip 1 is provided with a first locking groove 11 into which the first locking strip portion 41 of the front zipper fixing coil 4 can be inserted. A first connecting strip portion 42 of the front zipper fixing coil 4 is connected to the front chain belt 31. The rear zipper fixing coil 5 has a second locking strip portion 51 and a second connecting strip portion 52 which are connected to each other. The rear frame strip 2 is provided with a second locking groove 21 into which the second locking strip portion 51 of the rear zipper fixing coil 5 can be inserted. The second connecting strip portion 52 of the rear zipper fixing coil 5 is connected to the rear chain belt 32. The front lining fixing coil 6 has a third locking strip portion 61 and a third connecting strip portion 62 which are connected to each other. The front frame strip 1 is provided with a third locking groove 12 into which the third locking strip portion 61 of the front lining fixing coil 6 can be inserted. The third connecting strip portion 62 of the front lining fixing coil 6 is connected to the front lining 91. The rear lining fixing coil 7 has a fourth connecting strip portion 71 and a fourth connecting strip portion 72. The rear frame strip 2 is provided with a fourth locking groove 22 into which the fourth locking strip portion 71 of the rear lining fixing coil 7 can be inserted. The fourth connecting strip portion 72 of the rear lining fixing coil 7 is connected to the rear lining 92. The slider pull tab 60 is attached to the slider 33.

It is to be noted that the front frame strip 1 and the rear frame strip 2 may be made from various suitable materials. For instance, the front frame strip 1 and the rear frame strip 2 may be made from rubber, and form into rubber strips. In alternative embodiments, both the front frame strip 1 and rear frame strip 2 may be made from other appropriate materials, such as PC (polycarbonate), ABS (acrylonitrile-butadiene-styrene terpolymer), aluminum, aluminum alloys, iron, stainless steel, and so forth.

Preferably, as shown in FIG. 4 and FIG. 5 , the front frame strip 1 and the rear frame strip 2 are rigid rubber strips. The front frame strip 1 is provided with a recessed portion 13. The rear frame strip 2 is provided with a protrusion portion 23. When the suitcase is closed, the zipper strip 3 is pulled up, and the recessed portion 13 and the protrusion portion 23 are engaged together to make the suitcase fit more tightly. It is more reliable when full of luggage, and there will be no twisting of the zipper suitcase.

Preferably, as shown in FIG. 7 , after the front zipper fixing coil 4 and the front lining fixing coil 6 penetrate into the front frame strip 1, and the rear zipper fixing coil 5 and the rear lining fixing coil 7 penetrate into the rear frame strip 2, the connection position is covered by the rear cover 8. At the same time, the rear cover 8 can also prevent the zipper strip 3 from being disengaged from the connection position.

Preferably, as shown in FIG. 1 and FIG. 7 , a plurality of decorative strips 80 arranged vertically are provided on the outer surface of the trolley bag. The decorative strip 80 is blade-shaped. Irregular endings of the decorative strip make the decorative strip has a three-dimensional appearance.

As shown in FIG. 2 and FIG. 3 , the structure principle. The front frame strip 1 and the rear frame strip 2 are extrusion molding parts. It is formed into the same shape as the case by thermal pressing. The front frame strip 1 is assembled on the front case 10, and the front frame strip 1 and the front case 10 are bonded together by thermocompression. The rear frame strip 2 is assembled on the rear case 20, and the rear frame strip 2 and the rear case 20 are bonded together by thermocompression. This replaces the traditional lathe technology for zipper suitcase which has to lathe three-layer of stripes. The first connecting strip portion 42 of the front zipper fixing coil 4 is sewn on the front chain belt 31, and the second connecting strip portion 52 of the rear zipper fixing coil 5 is sewn on the rear chain belt 32, which realize automatic and unmanned sewing. After the machine is adjusted, the sew can be automatic. The sew length is based on the circumference of the case of the trolley bag. Then, the first locking strip portion 41 of the front zipper fixing coil 4 is inserted into the first locking groove 11 of the front frame strip 1, and the second locking strip portion 51 of the rear zipper fixing coil 5 is inserted into the second locking groove 21 of the rear frame strip 2 to fasten the zipper. This replaces the traditional process of sewing the zipper of the zipper suitcase. The front lining 91 is sewn on the third connecting strip portion 62 of the front lining fixing coil 6, and the rear lining 92 is sewn on the fourth connecting strip portion 72 of the rear lining fixing coil 7, so that automatic unmanned production can be realized during sewing. After the machine is adjusted, the sew can be automatic. The sew length is based on the circumference of the case of the trolley bag. Then, the third locking strip portion 61 of the front lining fixing coil 6 is inserted into the third locking groove 12 of the front frame strip 1, and the fourth locking portion 71 of the rear lining fixing coil 7 is inserted into the fourth locking groove 22 of the rear frame strip 2 to fasten the lining. This replaces the traditional sew process for zipper suitcase. It can be seen from the above that the structure of this product cancels the manual sewing, so that the zipper suitcase can be automatically produced.

Embodiment Two

As shown in FIG. 6 , the difference between this embodiment and the Embodiment One is that: in this embodiment, the thickness and cross-sectional shape of the front frame strip 1 and the rear frame strip 2 are adjusted according to the size of the box suitcase. Specifically, the second front frame strip 1A and the second rear frame strip 2A are used.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. 

What is claimed is:
 1. A zipper structure for suitcases, comprising a zipper strip (3); the zipper strip (3) comprises a front chain belt (31) and a rear chain belt (32); characterized by further comprising a front frame strip (1) and a rear frame strip (2); the front frame strip (1) is attached to the front case (10) of the suitcase; the rear frame strip (2) is attached to the rear case (20); the front chain belt (31) is connected to the front frame strip (1) through a front zipper fixing coil (4); the rear chain belt (32) is connected to the rear frame strip (2) through a rear zipper fixing coil (5).
 2. The zipper structure for suitcases according to claim 1, wherein a first extension portion (14) and a second extension portion (15) are arranged at intervals on the front frame strip (1); a first clamping slot (16) capable of receiving the insertion of the front case (10) is formed between the first extension portion (14) and the second extension portion (15).
 3. The zipper structure for suitcases according to claim 1, wherein a third extension portion (24) and a fourth extension portion (25) are arranged on the rear frame strip (2) at intervals; a second clamping slot (26) capable of receiving the insertion of the rear case (20) is formed between the third extension portion (24) and the fourth extension portion (25).
 4. The zipper structure for suitcases according to claim 1, wherein a first locking strip portion (41) of the front zipper fixing coil (4) is inserted into a first locking groove (11) of the front frame strip (1); a second locking strip portion (51) of the rear zipper fixing coil (5) is inserted into a second locking groove (21) of the rear frame strip (2).
 5. The zipper structure for suitcases according to claim 1, wherein the zipper structure also includes a front lining fixing coil (6) and a rear lining fixing coil (7); the front lining fixing coil (6) is connected to a front lining (91) of the suitcase; the rear lining fixing coil (7) is connected to a rear lining (92) of the suitcase; the front frame strip (1) is provided with a third clamping groove (12) into which a third clamping strip portion (61) of the front lining fixing coil (6) is inserted; the rear frame strip (2) is provided with a fourth clamping groove (22) into which a fourth clamping strip portion (71) of the rear lining fixing coil (7) is inserted.
 6. The zipper structure for suitcases according to claim 1, wherein the front frame strip (1) is provided with a recessed portion (13); the rear frame strip (2) is provided with a protrusion portion (23); when the zipper strip (3) is closed, the recessed portion (13) and the protrusion portion (23) are engaged together.
 7. The zipper structure for suitcases according to claim 1, wherein the front lining fixing coil (6) is sewn on the front lining (91); the rear lining fixing coil (7) is sewn on the rear lining (92).
 8. A trolley bag, wherein the trolley bag using the zipper structure for suitcases according to claim
 1. 9. The trolley bag according to claim 8, wherein the trolley bag further comprises a rear cover (8); the rear cover (8) is arranged on the trolley bag; the rear cover (8) is configured to cover a joint seam of the front frame strip (1) and the rear frame strip (2); two ends of the rear cover (8) are foot nails (81) that play a supporting role; a middle part of the rear cover (8) is a soft rubber portion (82).
 10. The trolley bag according to claim 8, wherein a plurality of decorative strips (80) arranged vertically are provided on an outer surface of the trolley bag; the decorative strip (80) is blade-shaped. 